#375F8F
Closest named color: Denim Blue (#3B5B92). oklch(47.9% 0.09 254), rgb(55, 95, 143).
Aa
White text reads best on this color (6.57:1).
About this color
#375F8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.090 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.014 away. White text reads best on it, at 6.57:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.19:1 |
| White text | 6.57:1 |
Values
| HEX | #375F8F |
| RGB | rgb(55, 95, 143) |
| HSL | hsl(213, 44%, 39%) |
| OKLCH | oklch(47.9% 0.09 254) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #375F8F | 6.57:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #375F8F | 3.19:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #375F8F text on white | 6.57:1 | AA | Lc 82.4 | Fine for body text |
| #375F8F text on black | 3.19:1 | AA large text | Lc -19.5 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EAF2
oklch(93.5% 0.013 255.5)
-
Step 200
200
#CEDAE9
oklch(88.4% 0.024 254)
-
Step 300
300
#AEC3DD
oklch(81% 0.043 253.8)
-
Step 400
400
#83A3CC
oklch(70.7% 0.07 254.8)
-
Step 500
500
#638CBF
oklch(63.1% 0.09 254.4)
-
Step 600
600
#4976AB
oklch(55.7% 0.097 253.4)
-
Step 700
700 (this color)
#375F8F
oklch(47.9% 0.09 254)
-
Step 800
800
#315177
oklch(42.8% 0.074 253.6)
-
Step 900
900
#2B4360
oklch(37.7% 0.058 253.8)
-
Step 950
950
#1A2738
oklch(26.9% 0.037 255.4)
#375F8F with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4B6291 | 0.026 |
| Deuteranopia (no green cones) | #3F598E | 0.018 |
| Tritanopia (no blue cones) | #006A70 | 0.076 |
| Achromatopsia (no color) | #5D5D5D | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375F8F
#375F8F
oklch(47.9% 0.09 254)
- #7B5517
#7B5517
oklch(47.9% 0.09 74.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #375F8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.014
- Denim #3B638C ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.021
- Dusky Blue #475F94 ΔE 0.021
- Peacock Blue #016795 ΔE 0.034
- YInMn Blue #415A77 ΔE 0.039
- Dusk #4E5481 ΔE 0.041
- Dusk Blue #26538D ΔE 0.042
Use #375F8F in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.